Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Merdan, Mehmet(7)
- Akaryali, Enver(6)
- Gücer, Mehmet Ali(6)
- Komut, Osman(6)
- Akyol, Mehmet(5)
- Evren, Savaş(5)
- Hintistan, Sevilay(5)
- Ozden, Talat(5)
- Saydam Eker, Çiğdem(5)
- Acet, Tuba(4)
- Akinoglu, Bulent G.(4)
- Alemdag, Selcuk(4)
- Aydin, Metin Mutlu(4)
- Bahar, Bilge(4)
- Baltaci, Cemalettin(4)
- Beken, Hıkmet Gülçın(4)
- Kandemir, Raif(4)
- Keyifli, Nazlı(4)
- Kose, Oguz(4)
- Koç, Pinar(4)
- Oktay, Tugrul(4)
- Pasli, Sinan(4)
- Sirat, Abdulveli(4)
- Tatli, Ozgur(4)
- Taşdelen, Birgül(4)
- Ugur, Omer(4)
- Vural, Alaaddin(4)
- Yildiz, Salih(4)
- Yücel, Cem(4)
- Zeybek, Halil İbrahim(4)
- Çelik, Muhammet(4)
- Ürkek, Bayram(4)
- Şahin, Rıdvan(4)
- Akar, Zeynep(3)
- Akpinar, Muhammet Vefa(3)
- Ar, Ilker Murat(3)
- Araz, Onur(3)
- Arslan, Mehmet(3)
- Ashyralyyev, Charyyar(3)
- Aydin, Faruk(3)
Yayınlar
- MakaleAçık Erişim2020A note on well-posedness of source identification elliptic problem in a Banach space; [Банах кеңiстiгiнде дереккөздi сәйкестендiруде эллипстiк есептiң корректiлiгi туралы ескерту]; [Замечание о корректности эллиптической задачи идентификации источника в банаховом пространстве]
Ashyralyev, A.; Ashyralyyev, C.; Zvyagin, V.G.
We study the source identification problem for an elliptic differential equation in a Banach space. The exact estimates for the solution of source identification problem in Hölder norms are obtained. In applications, four elliptic source identification problems are investigated. Stability and coercive stability estimates for solution of source identification problems for elliptic equations are obtained.
- MakaleAçık Erişim2020The effect of shape-controlled pt and pd nanoparticles on selective catalytic hydrodechlorination of trichloroethylene
Sarıbıyık, Oğuz Yunus; Rupprechter, Günther; Weilach, Christian; Serin, Selahattin
Tailoring the shape of nanoscale materials enables obtaining morphology-controlled surfaces exhibiting specific interactions with reactants during catalytic reactions. The specifics of nanoparticle surfaces control the catalytic performance, i.e., activity and selectivity. In this study, shape-controlled Platinum (Pt) and Palladium (Pd) nanoparticles with distinct morphology were produced, i.e., cubes and cuboctahedra for Pt and spheres and polyhedra/multiple-twins for Pd, with (100), (111 + 100), curved/stepped and (111) facets, respectively. These particles with well-tuned surfaces were subsequently deposited on a Zirconium oxide (ZrO2 ) support. The morphological characteristics of the particles were determined by high resolution transmission electron microscopy (HR-TEM) and X-ray diffraction (XRD), while their adsorption properties were investigated by Fourier transform infrared spectroscopy (FTIR) of CO adsorbed at room temperature. The effect of the nanoparticle shape and surface structure on the catalytic performance in hydrodechlorination (HDCl) of trichloroethylene (TCE) was examined. The results show that nanoparticles with different surface orientations can be employed to affect selectivity, with polyhedral and multiply-twinned Pd exhibiting the best ethylene selectivity.
- MakaleAçık Erişim2020Blue stain in lumber industry and losses caused by cutting methods
Komut, Osman
In this study, it is aimed to determine the waste and productivity losses of Scots pine (Pinus sylvestris L.) logs that were exposed to blue stain degradation. In this context, a total of 39 timber production processes were analyzed in 7 different lumber managements using prism cutting and sharp cutting method. The main product yield and additional processing requirements were determined for flawed and flawless logs in blue stain damage. As a result of the study, it was determined that the blue stain degradation decreased the main product efficiency by 17% in the prism cutting method and by 33% in the sharp cutting method. Statistically significant differences were discovered between the efficiency values obtained as a consequence of cutting flawed and flawless logs with prism and sharp cutting methods. In addition, additional processing requirements were determined in the sharp mowing method.
- MakaleYalnız künye2020Preparation and characterization of bacterial cellulose produced from fruit and vegetable peels by Komagataeibacter hansenii GA2016
Güzel, Melih; Akpınar, Özlem
This study focused on the investigation of bacterial cellulose production potency of some fruit and vegetable peels (cucumber, melon, kiwifruit, tomato, apple, quince and pomegranate) with Komagataeibacter hansenii GA2016. Fruit and vegetable peels were hydrolyzed, used for bacterial cellulose (BC) production and their chemical, physical, thermal and structural features were compared to BC from Hestrin–Schramm medium (HSBC) and plant cellulose (CP). Except for pomegranate peel hydrolysate, all the fruit and vegetable peel hydrolysates supplied to K. hansenii GA2016 supported the BC production. Among the fruit and vegetable peel hydrolysates, the highest BC production was observed in kiwifruit peel hydrolysate (11.53%), while the lowest production was observed in apple peel hydrolysate (1.54%). Water-holding capacities of the BCs were ranged from 627.50% to 928.79% and higher than HSBC (609.30%), average fiber diameters were ranged from 47.64 nm to 61.11 nm and thinner than HSBC (74.29) and CP (10,420 nm), crystallinities were ranged from 80.27% to 92.96%, thermal capacities BCs were higher than HSBC and CP. For the BC productions, utilization of the fruit and vegetable peels as the sole nutrient source could reduce the production costs and among the polysaccharides, increase the use of BC in industry.
- MakaleAçık Erişim2020Cohabitant charophyte algal flora and its ecology in high-mountain lakes of the Artabel Lakes Nature Park (Gumushane, Turkey)
Şahin, Bülent; Akar, Bülent; Barinova, Sophia
The composition of charophyte taxa and their habitat preferences in water bodies of the Artabel Lakes Nature Park were investigated on 15 August 2013 and 13 August 2016. A total of 73 taxa belonging to Conjugatophyceae (Zygnematophyceae) and Klebsormidiophyceae were recorded. The genera Cosmarium (37), Staurastrum (10) and Closterium (7) were most abundant. The partly unexpected presence of certain desmid taxa, i.e., taxa characteristic of eutrophic water, was recorded. Filamentous charophytes were represented by three taxa. The Willis curve for the distribution of species to genera had a trend line of R2 = 0.9123. Bioindication, statistical methods and comparative floristic results show that water in all of the studied lakes was fresh, of low-conductivity, circum-neutral and with little organic pollution. Four groups of lakes were identified as a result of statistical comparison of their environmental and biological variables. Bioindication results can be used as references for future monitoring of the lakes in protection of the species found in the Artabel Lakes Nature Park and can also be included in the National Water Quality Standard System of Turkey.
- MakaleYalnız künye2020The effects of media tools on food consumption and obesity in adolescents
Kartal, Fatma; Rakicioglu, Neslisah
Purpose: The present study was aimed to define the quantities and types of foods consumed by adolescents during use of media tools to evaluate the contribution of energy and nutrient intake during the use of media tools to daily energy and nutrient intake. Methods: A total of 73 adolescents who visits an internet cafe, were included in the study. Participants were evaluated when they were using a computer in an internet cafe, food consumptions during the use of media tools and daily consumption and physical activity level were recorded. Results: It has been found that consumption of cakes, pastries and cookies during the use of media tools constitute more than half of daily consumption. At the same time, consumption of oily seeds, consumption of sweet foods and saturated fat consumption during the use of media tools were contributed to the daily consumption significantly. It was found that, adolescents consumed less egg, legumes, milk and dairy products, and vegetables in front of the media tools (p<0.05). A significant correlation was observed between the energy and fat content of foods consumed in front of media tools, and obesity. Also, time spend in the internet cafe are increasing as the energy intake during the use of the media tools increases (p<0.05). Conclusion: Consequently it is necessary to reduce the time spend in front of media tools and regulate the consumed foods during the use of media tools to live a healthier life and reduce the risks of development chronic disease in the future lives.
- Derleme MakaleAçık Erişim2020The effect of operating expenses on growth and performance: An empirical analysis of the petroleum and chemistry industry in Turkey
Pehlivan, Abdulkadir; Gerekan, Bilal; Kocan, Mahmut
The aim of this study is to determine the effect of operating expenses on performance and growth in the petroleum and chemical industry. Operating expenses include research and development (R&D), marketing and administrative expenditures. Determining the distribution of these expenses in this industry an important issue. The data obtained from companies operating in the petroleum and chemical industry were analyzed using two separate models. Within the scope of research, it was determined that R&D expenditure has no significant effect on performance and growth. Marketing expenditure negatively affects performance and has no significant effect on growth. Finally, it was concluded that administrative expenditure has a significant positive effect on both performance and growth. These results indicate that ineffective R&D and marketing expenditures in this industry should be avoided. On the other hand, in terms of management function, it explains that expenditure should be shifted to the areas that will contribute, especially towards the future.
- MakaleAçık Erişim2020Effect of cellulose nanofiber-based coating with chitosan and trans-cinnamaldehyde on the microbiological safety and quality of cantaloupe rind and fresh-cut pulp. Part 1: Microbial safety
Zhang, Jin; Ozturk, Samet; Singh, Rakesh K.; Kong, Fanbin
This study aimed to evaluate the effect of cellulose nanofiber (CNF)-based coating containing chitosan (CHI) and trans-cinnamaldehyde (TC) on microbial growth of foodborne pathogens and spoilage microorganisms on cantaloupe rind and fresh-cut pulp. Coated/uncoated cantaloupe rind and pulp samples were inoculated with Salmonella enterica, Escherichia coli O157:H7 and Listeria monocytogenes and subsequently subjected to storage for 20 d at 4 °C or 12 d at 22 °C. Results showed that coating with only CNF (0.5%, dry-base) was effective in the elimination of S. enterica and E. coli O157:H7. Adding CHI (1%, w/w) and TC (1%, w/w) into CNF-based coating enhanced film formation on the surface and increased the antimicrobial activity on rind sample, but the reduction effect was less significant on pulp samples. The CNF (0.5%, dry-base) +CHI (1%, w/w) +TC (1%, w/w) coating resulted in 2.23, 2.43 and 3.22 log10 CFU/cm3 reduction of S. enterica, E. coli O157:H7 and L. monocytogenes, respectively, on pulp samples after 20 d at 4 °C. The formulation also significantly inhibited the growth of natural spoilage microorganisms, and no growth was observed up to 18 d at 4 °C. Results indicated that CNF-based coating significantly improved microbial safety of cantaloupe rind and fresh-cut pulp during storage by forming a physical barrier reducing activities of oxygen-dependent microorganisms.
- MakaleAçık Erişim2020Geometric and monotonic properties of hyper-Bessel functions
Aktaş, İbrahim; Baricz, Árpád; Singh, Sanjeev
Some geometric properties of a normalized hyper-Bessel functions are investigated. Especially we focus on the radii of starlikeness, convexity, and uniform convexity of hyper-Bessel functions and we show that the obtained radii satisfy some transcendental equations. In addition, we give some bounds for the first positive zero of normalized hyper-Bessel functions, Redheffer-type inequalities, and bounds for this function. In this study we take advantage of Euler–Rayleigh inequalities and Laguerre–Pólya class of real entire functions, intensively.
- MakaleAçık Erişim2020Illness perception, perceived social support and quality of life in patients with diagnosis of cancer
Aydın Sayılan, Aylin; Demir Doğan, Melike
Introduction: Research has shown that social support has a significant impact on quality of life. The purpose of this cross-sectional study was to determine the relationship between perceived social support, perception of disease and quality of life, and the factors affecting these, in patients with cancer in Turkey. Methods: The study data were collected from two hospitals. Data were collected using the face-to-face interview method from patients diagnosed with cancer between March and August 2018. No sampling was performed, and the entire population was studied. Results: The mean age of the patients in the study was 61.37 ± 14.89 years. Married patients had better social support than single individuals (t = 2.129; p = 0.035). Significant negative correlation was found between the illness perception scale and total quality of life scale score (r = −0.163; p = 0.026), and physical well-being (r = −0.224; p = 0.002) and social well-being (r = −0.199; p = 0.006) subscales. Conclusion: Patients’ social support and quality of life were at moderate levels. Married participants had better social support than single participants, and operated participants had better social support than unoperated participants. As illness perception decreased, quality of life, physical well-being and social well-being increased.
- MakaleAçık Erişim2020Investigation of linear difference equations with random effects
Merdan, Mehmet; Şişman, Şeyma
In this study, random linear difference equations obtained by transforming the components of deterministic difference equations to random variables are investigated. Uniform, Bernoulli, binomial, negative binomial (or Pascal), geometric, hypergeometric and Poisson distributions have been used for the random effects for obtaining the random behavior of linear difference equations. The random version of the Z-transform, the RZ-transform, has been used to obtain an approximation for the random linear difference equation. Approximate expected values and variances are calculated by using the RZ-transform. The results have been obtained with Maple and are shown in graphs. It is shown that the random Z-transform is an effective tool for the investigation of random linear difference equations.
- MakaleAçık Erişim2020The impact of dietary tarragon (Artemisia dracunculus) on serum apelin, brain-derived neurotrophic factor, cardiac troponin concentrations and histopathology of liver tissue in laying hens housed at different stocking densities
Bayraktar, Bulent; Tekce, Emre; Kaya, Hacer; Karaalp, Musa; Turunc, Eylul
Due to its association with several other stress factors (poultry house gases, inadequate ventilation, heat, cold and poor hygiene), the high stocking density is a major stress factor that adversely affects the health and performance of poultry and the quality of the poultry products. Therefore, this experimental study was aimed at analysing the impact of different doses of dietary tarragon (Artemisia dracunculus) on the serum apelin, plasma brain-derived neurotrophic factor (p-BDNF), and cardiac troponin I (cTnI) concentrations, and the correlation between these indicators in laying hens housed at different stocking densities. The aim of this study is to investigate the effects of adding tarragon in different ratios to laying hen rations in the 2ndovulation period on the cTnI, apelin, and BDNF hormone concentrations and the liver histopathology. The experiment was carried out over a period of eight weeks, with 192 Lohman Brown commercial hybrids at 50 weeks of age. Eight groups (four replicates each), composed of laying hens of equal body weight, which were housed at stocking densities of 580 cm2/hen and 810 cm2/hen and received 0, 1, 5 and 10 mmol/kg of tarragon (Artemisia dracunculus) in the feed, were established. At the end of the trial, 96 of the housed egg-laying hens (3 birds in each subgroup, a total of 12 birds in each group) were randomly selected and blood samples were taken from the vena subcutanea ulnaris. The samples collected were analysed for the apelin, p-BDNF, and cTnI contents. The analysis results demonstrated that tarragon supplementation had no effect on the serum apelin, p-BDNF and cTnI concentrations (P > 0.05). The Sub-Groups ST1, ST1.2, and ST6 presented with severe hyperaemia of the sinusoidal, portal and acinar blood vessels, whilst the hyperaemia of these blood vessels was moderate in Sub-Group ST12. Apelin, BDNF, and cTnI can act as protective factors against negative consequences of stress (e.g., stocking density or heat stress).
- Kitap BölümüYalnız künye2020Local governments in Sweden: Structure, reform and financial opportunities
Doğan, Kadir Caner
- Kitap BölümüYalnız künye2020Main Reasons of Government Reforms in Turkey and the Legislation/Reform Efforts between 1990 and 2007
Kalkişim, Hasan Mahmut
- MakaleAçık Erişim2020Forward converter-based distributed global maximum power point tracking in partial shading conditions
Başoğlu, Mustafa Engin
Maximum power point tracking (MPPT) is an essential part of a photovoltaic (PV) power generation systems to obtain the possible biggest efficiency. In partial shading conditions (PSCs), distributed MPPT strategy is used to eliminate mismatching cases between PV modules and load. In this study, forward converter-based distributed MPPT approach is presented for small power module-level and submodule-level MPPT applications. First, operation principles of a forward converter are explained for an MPPT application. Then, performance of a forward converter is evaluated by perturb and observe (P&O) algorithm for module-level and submodule-level MPPT systems in MATLAB/Simulink. Simulation results show that in module-level MPPT technique, forward converter cannot track global maximum power point (MPP) in some PSCs. On the other hand, submodule-level MPPT guarantees global MPPT (GMPPT). Average tracking efficiencies are calculated as 71.24% and 95.34% for module-level and submodule-level MPPT, respectively. That is, submodule-level MPPT outperforms module-level MPPT. On the other hand, submodule-level MPPT is more expensive solution since hardware requirements are very high compared with the module-level MPPT strategy.
- MakaleAçık Erişim2020OPPORTUNITIES PROVIDED BY REMOTE SENSING DATA FOR WATERSHED MANAGEMENT: EXAMPLE OF KONYA CLOSED BASIN
Yagmur, Nur; Tanik, Aysegul; Tuzcu, Aylin; Musaoglu, Nebiye; Erten, Esra; Bilgilioglu, Baha
Remote sensing data provides great opportunities in various steps of watershed management like characterization of watersheds that bear dynamic structure with large land, monitoring the physical variations within the basin, and conducting various scenario analyses to detect the response of the basin. The high resolution capacity of today’s satellite images enables the production of land use/cover data of a basin in shorter period of time. In this study, it is aimed to demonstrate various aspects of remote sensing technology to be used in watershed management studies. For that purpose, MODIS, Landsat and Sentinel satellite data with different spatial resolutions were used to monitor the surface water bodies in Konya Closed Basin (KCB) of Turkey. In addition, high spatial Worldview-3 satellite data were used to extract detailed information about Akgol Wetland located in KCB. A methodology was developed on the utilization of remote sensing technology consisting of 3 main groups; field surveys, satellite images and ancillary data. In the study, 5 different spectral indices were applied to Sentinel 2 data to determine the areas of surface water bodies. Moreover, Support Vector Machine (SVM) method was applied to Worldview-3 satellite image to classify Akgol Wetland and its vicinity. The importance of establishing watershed information system together with a database reflecting the characteristics of watersheds was underlined. Various examples were given from KCB that is known as the largest closed basin of the country with a surface area of 5.426.480 ha. The basin owns 17 water bodies out of which 2 of them are RAMSAR sites. Within the scope of the study, information obtained from optical and synthetic aperture radar (SAR) satellite images in the basin were discussed. More accurate results were achieved by Sentinel 2 than MODIS and Landsat data. In addition, detailed information about the wetland were extracted by means of Worldview-3 data and water bodies were monitored in all weather conditions via Sentinel 1 SAR data.
- Kitap BölümüYalnız künye2020Public debts and personal income distribution: An empirical practice for EU countries
Keyifli, Nazli
- MakaleYalnız künye2020Some geometric properties of the non-Newtonian sequence spaces lp(N)
Güngör, Nihan
In this paper, we generalize the concepts of convexity, strict convexity and uniform convexity in the sense of non-Newtonian calculus. The main aim of this study is to obtain the non-Newtonian convexity, non-Newtonian strict convexity and non-Newtonian uniform convexity properties of the non-Newtonian sequence spaces lp(N).
- MakaleYalnız künye2020Eocene I-type magmatism in the Eastern Pontides, NE Turkey: insights into magma genesis and magma-tectonic evolution from whole-rock geochemistry, geochronology and isotope systematics
Kaygusuz, Abdullah; Yücel, Cem; Arslan, Mehmet; Temizel, İrfan; Yi, Keewook; Jeong, Youn-Joong; Siebel, Wolfgang; Sipahi, Ferkan
The Eastern Pontides orogenic belt in NE Turkey hosts numerous I-type plutons of Eocene epoch. Here, we report new U–Pb SHRIMP zircon ages and in situ zircon Lu-Hf isotopes along with bulk-rock geochemical and Sr-Nd-Pb-O isotope data from the Kemerlikdağı, Aydıntepe and Pelitli plutons and mafic microgranular enclaves (MMEs) to constrain their parental melt source(s) and evolutionary processes. U-Pb SHRIMP zircon dating yielded crystallization ages between 45 and 44 Ma for the studied plutons and their MMEs. The plutons range from gabbro to granite and have I-type, medium to high-K calc-alkaline, and metaluminous to slightly peraluminous characteristics. On the primitive mantle-normalized multi-trace-element variations, the plutons and their MMEs are characterized by significant enrichment in LILE/HFSE. Chondrite-normalized REE patterns of the plutons and their MMEs are close to each other and show moderate enrichment with variable negative Eu anomalies. The studied plutons have fairly homogeneous isotope composition (87Sr/86Sr(i) = 0.70502 to 0.70560; εNd(i) = +0.9 to–1.4; δ18O = +5.0 to +8.7‰, εHf(i) =–2.2 to +13.5). The MMEs show medium to high-K calc-alkaline and metaluminous character. Although the isotope signatures of the MMEs (87Sr/86Sr(i) = 0.70508 to 0.70542; εNd(i) = +0.9 to −1.1; δ18O = +5.8 to +8.0, εHf(i) = +4.3 to +10.4) are very similar to those of the host rocks. Fractionation of plagioclase, amphibole, pyroxene and Fe-Ti oxides played an important role in the evolution of the plutons. The isotopic composition of the studied plutons and MMEs are similar to I-type plutons derived from mantle sources. The MMEs show incomplete magma mixing/mingling, representing small bodies of mafic parental magma. The parental magma(s) of the studied plutons were generated from the enriched lithospheric mantle and then modified by fractional crystallisation, and lesser assimilation and mixing/mingling in the crustal magma chambers.
- Kitap BölümüYalnız künye2020Assessing Contribution of Climate Change on Wetlands by Using Multi-temporal Satellite Data
Musaoglu, Nebiye; Dervisoglu, Adalet; Yagmur, Nur; Bilgilioglu, Baha; Tuzcu, Aylin; Tanik, Aysegul; Filho, WL; Nagy, GJ; Borga, M; Munoz, PDC
Numerous natural lentic systems of the world are under the threat of drying due to either natural or anthropogenic activities. Natural circumstances are basically due to climate change effects remarkably sensed within the past decades. However, human-induced activities in some cases dominate over natural events due to demand of water particularly for irrigation and domestic needs. This study investigates the changes that have occurred on the water surfaces of 3 significant water bodies located in the Konya Closed Basin of Turkey. Geographically inner Anatolia region of Turkey receives half of the annual average precipitation of the overall country; on the contrary, the region is known to be an important agricultural area. The majority of fertile arable land is spared to wet agriculture necessitating vast amounts of water. As expected, all the 3 water bodies have incredibly lost their water within years. In the multi-temporal analysis of the study area, Landsat 5 TM, 7 ETM+ and 8 OLI satellite images belonging to every 10-years interval between 1987 and 2017, and corresponding meteorological data were used. Water losses in the 3 ecosystems, one is a salt production lake, Tuz (Salt) Lake, the other is a Ramsar Site (Meke Maar), and the last one is an internationally recognized wetland (Akgol), are detected. Resultantly, it is observed that only Tuz Lake has been artificially fed in the last decade as its economic value is higher than the other two systems. Meke Maar and Akgol Wetland have high ecological value; however, their original functions vanished as they have almost lost their water. It is important to state that humans’ need of water is essential; but, unconscious utilization and wrong irrigation applications lead to water scarcity. On the other hand, climate change accelerates the reduction of water resources. Satellite data coupled with ground truth measurements are accepted as modern technological tools to detect short and long term temporal changes in the water surfaces of such vulnerable water systems especially for attracting the attention of decision-makers responsible of sustainable management of water resources.